- (1) Polk Audio MM842DVC 8” 900 Watt Dual 4-Ohm Car/Marine Boat Audio Subwoofer Sub
- (1) Rockville Rockmat RM12-B 12 Sq Ft Sound Dampening/Deadening Butyl Rubber Car Kit
Authorized Polk Dealer!
Description of MM842DVC:
The Premium Upgrade
Tuned for the total sonic accuracy you get in a studio subwoofer, the MM1 Series reconfigures this kind of high-quality deep bass impact for an on-the-go listening experience that totally outperforms your OEM factory setup.
Advanced High-Performance Bass
Every element of the MM1 Series is meticulously engineered for thunderous bass, enhanced sonic detail and ultra-durable construction—Dynamic Balance technology, a high excursion bump stack motor structure, glass fiber formers, multilayered and oversized voice coils, high-temp Conex spiders, a vented pole and basket structure, and integrated fuses.
Featuring an IP56 rating that includes a non-corrosive fiberglass reinforced ABS basket, a water-proof surround, weep holes for proper drainage and a polypropylene cone, you get extra, long-lasting protection—that’s all salt-fog and UV tested.
Dynamic Balance Technology
Patented process that guides material selection through rigorous testing that identifies and cancels out unwanted resonant frequencies.
- One 8" 4 ohm subwoofer
- Stainless steel mounting hardware
- Polk Audio MM842DVC 8” 900 Watt Dual 4-Ohm Car/Marine Boat Audio Subwoofer Sub
- Driver Compliment: 8" (203.2 mm)
- Cutout Dimensions: 7.2" (185mm)
- Mounting Height: 0.55" (14.06mm)
- Mounting Depth (Top): 4" (105mm)
- Mounting Depth (Bottom): 4.68" (119mm)
- Peak Power Handling: 900 Watts
- RMS Continuous Power Handling: 300 Watts
- Nominal Impedance: 4 Ohms
- Frequency Response: 30Hz-200kHz
- Sensitivity: 85 dB
- Magnet Weight: 40.5 oz
- Magnet Material: Ceramic
- Magnet Size: 120mm x 50mm x 25mm
- VC Diameter: 1.5"
- Enclosure Volumes:
- Minimum Sealed: 0.5 cu. ft.
- Maximum Sealed: 1.2 cu. ft.
- Minimum Vented: 0.66 cu. ft.
- Maximum Vented: 1.2 cu. ft.
Video of RM12-B:
Description of RM12-B:
- 4 Sheets of Rockmat Sound Dampening Material (3 square feet per sheet)
- Roller for a perfect installation
The Rockville Rockmat RM12-B sound dampening material is a must have for any professional car audio install. This package includes 4 sheets that are each 3 square feet. This gives you a total of 12 square feet. This is perfect to be used as a door kit to cover all 4 of your doors. We also include everything needed for a quick and easy installation! Our Rockmat will increase how loud your car stereo plays! It also improves bass quality and eliminates those bad rattling and distortion sounds.
Installing Rockmat improves bass quality of the speaker and eliminates those bad rattling and distortion sounds.
Rockmat is built to the highest standards in this
industry using 100% butyl rubber with a layer of heat resistant
aluminum. Butyl rubber is the same material high end
speakers surround material is made out of. We use the highest
self-adhesive to make your installation quick and easy. Our
flexibility for an easier and more permanent installation! Our
product uses 72mil of pure grade aluminum! Most products on the
50mil. Our product will absorb sound better than the
competition. The other products on the market like most of the
GTMAT series for example use
asphalt in their products. They basically are manufacturing
calling it sound deadener. Their product will work OK, but not
as our Rockmat. Our Rockmat is made of 100% butyl rubber and an
aluminum heat resistant shield
which is the same as many of the more expensive brands out there
sell for twice our price.. We only make top quality gear
here at Rockville! These are comparable to the ONYX series by
GTMat. (Only we sell it for the price of their lower series!).
Our Rockmat has an adhesive temperature range of -100F to 300F (-60C to 150C). Our adhesive is top of the line! It will stick for years and years! Each layer of our material reduces unwanted noise 5-8 dB! This is among the best ratings in the industry. Our product works as well or better than other high end brands! We did our testing and research.
Rockmat is a self-adhesive. Stick the Rockmat in your desired area. Rockmat is pressure sensitive so after you apply the material into your desired area; apply pressure to it. That is it! Installation takes only minutes! Please note our Rockmat is also easy to cut into the desired shape you need!
To prove how good our sound dampening material is we will offer a 90 day money back guarantee! If you are not happy with the performance; simply pack it up and we will send you a label and give you a complete refund when it comes back to us!
- Rockville Rockmat RM12-B 12 Sq Ft Sound Dampening/Deadening Butyl Rubber Car Kit
- Contains 4 sheets
of sound damping material – Each sheet is 12" inch x 36" inch (3
sq. ft. per sheet)
- Paintable Surface
- Recommended for use as a door kit or trunk lid kit
- Increases SPL –
The use of our Rockmat will not only make your sound more clear and
eliminate distortion but it will make your music louder by
- Eliminates sound
- Improves Bass
Quality and Reduces Bass
- Kill unwanted
noise, rattles, vibrations
- Reduce exhaust
and engine noise
- 72mil thickness
- Full car
installation reduces unwanted noises 5-8 dB
- We use the
highest quality high-tack self-adhesive to make your installation quick and
- Our model has new
and improved increased flexibility for an easier installation and top
installation with ability to withstand even the highest temperatures!
material! Our material is very durable. It is waterproof, heat proof
- Sticks to any
- Designed and
engineered by Rockville USA!
- Manufactured with
the newest state-of-the-art machinery using only the purest raw
materials as well!
- Every product is
checked during production for consistency. We have very high quality
- We use very high
quality butyl rubber which gives amazing sound insulation and shock
absorption. We do not use any asphalt in our product!
- Dimensions per
sheet: 12" inch Length x 36" inch Width x 0.07' sheet Depth
- Raw Material: 90%
high absorbent butyl rubber and 10% pure-grade
- High-Tack Self-adhesive
- Reduces unwanted
noises 5-8 dB
temperature range of -100F to 300F (-60C to 150C).
- Material Color: Black
- Weight: 8.55 (Lbs.)
- Shipping weight: 9.48 LBS
Dimensions: 16.34" x 14.57" x 2.36"
- Made of high
quality Wood & Steel
especially for use in installing sound dampening material
- Length: 7 in
- Handle Length: 5
Diameter: 1.3 in
- Material Color: Black
- Weight: 0.44 Lbs.